1
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
The momentum of a photon of energy 1 MeV in kg m/s will be
A
5 $$ \times $$ 10$$-$$22
B
0.33 $$ \times $$ 106
C
7 $$ \times $$ 10$$-$$24
D
10$$-$$22
2
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
In a discharge tube ionization of enclosed gas is produced due to collisions between
A
neutral gas atoms/molecules
B
positive ions and neutral atoms/molecules
C
negative electrons and neutral atoms/molecules
D
photons and neutral atoms/molecules.
3
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
Ionization potential of hydrogen atom is 13.6 eV. Hydrogen atoms in the ground state are excited by monochromatic radiation of photon energy 12.1 eV. According to Bohr's theory, the spectral lines emited by hydrogen will be
A
one
B
two
C
three
D
four
4
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
In a radioactive material the activity at time t1 is R1 and at a later time t2, it is R2. If the decay constant of the material is $$\lambda $$, then
A
R1 = R2
B
R1 = R2e$$-$$$$\lambda $$(t1$$-$$t2)
C
R1 = R2e$$\lambda $$(t1$$-$$t2)
D
R1 = R2(t2/t1).
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